You have invested in a gym membership and you are excited about going on your first day. You inhale the smell of socks in the locker room and you know you have come to the right place: this will be the time that you will achieve your best ever gym workout and this is the gym that will help you do it! Yet no sooner have you gone out on the floor, when a peculiar sight meets your eyes: there is a whole group of exercise aficionados sweating and working and scurrying from one machine and activity to the next with little or no rest. Reminiscent of squirrels jumping from tree to tree you wonder what is going on, until a veteran exerciser next to you whispers the magic words: circuit training.

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